Engine Component Description
Cylinder Block
The cylinder hollow frame structured in–line 4 cylinder. The block has 5 crankshaft bearings with the thrust bearing located on the third bearing from the front of the engine.
Crankshaft
The crankshaft is a steel crankshaft. It is supported in 5 main journals with main bearings which have oil clearance for lubrication. The 3rd bearing is the thrust bearing which controls the proper axial end play of the crankshaft. A harmonic damper is used to control torsional vibration.
Oil Pump
The engine is equipped with a variable oil pump. The oil pump is integrated into the engine front cover and provides different oil pressure values depending on the engine speed.
Oil Pan
The oil pan is a structural aluminum oil pan with transmission attachment points. The oil suction gallery for the oil pump is integrated into the oil pan.
Piston and Connecting Rod
The pistons are aluminum pistons. The connecting rods are made of fractured steel. The piston pin is floating in piston bore and shrinked in connecting rod.
Cylinder Head
This cylinder head is a double over head camshaft (DOHC) type and has 2 camshafts that open 4 valves per cylinder with hydraulic valve lash adjusters and hydraulic valve lash adjuster arms. The cylinder head is made of cast aluminum alloy for better strength and hardness while remaining light weight. The combustion chamber of the cylinder head is designed for increasing of squish and swirl efficiency to help maximize gasoline combustion efficiency.
Camshaft Drive with Variable Camshaft Timing
A timing chain is used for camshaft drive. There is a tensioner to control the tension of the chain. The engine is equipped with a variable camshaft timing system. The camshaft adjuster will readjust itself depending on the engine speed. The valve timing readjusts to reduce fuel consumption and provide optimal power and torque.
"not" from gm service information. I took out the intake and turbo sections because theyre pretty pointless, not that this was very informative
I feel like its a well built piece. I havent found enough info on the heads to make the assessment on them though. I Like how the main caps are one solid piece. Idk what "fractured steel" is. Is that forged? Cast? Something else?
Also ive read that the crank is "cast reinforced" Whats reinforced about it? or is that the main cap theyre talking about.